Apparatus for making bags



Sept. 22, 1936. I A? PQTDEV|N 2,054,833

APPARATUS FOR MAKING BAGS Original Filed Sept. 6, 1933 ATTORN EYSPatented Sept. 22, 1936 PATENT OFFICE 2,054,332 APPARATUS roa MAKINGBAGS Adolph Potdevin,

assignor to lyn, N. 1..

Garden City, Potdevin Machine Company, a corporation of New York LongIsland, N. Y.,

Brook- Original application September 6, 1933, Serial No.

688,279. Divided and her 20, 1934, Serial No.

13 Claims.

This invention relates to improvements in apparatus for making bags andis particularly well adapted for making bags from material such ascellulose acetate, cellulose hydrate, glassine, and- 5 like materials,as distinguished from paper.

In the accompanying drawing:

Fig. 1 is a plan view somewhat diagrammatic of an apparatus constitutingone embodiment of my invention;

Fig. 2 is a side Fig. 1; and Figs. 3,4 and stages of its manufacture.

Referring to the drawing in detail: The ma- 15 terial is taken from asupply roll I and the web. designated 2, is led about av roller 3 andpast plates 4 which are adapted to fold the opposed edges of the webover toward each other upon the main body of the web to form flanges 5at opposite sides of the web.

The web then passes between rollers 5 by which the flanges are turnedoutwardly again so that the web is once more flat. I

r In its flattened condition the web passes note ing mechanismcomprising notchers 1 and 5 at each side of the web and adapted to notchthe web as shown at 9 and ill. The notchers 1 and 8 are mounted on thesame shafts.

The notchers I and 8 are held to their supporting shaft II by screwsl2,'so that the spacing of the notches 9 and I lengthwise of the web 2may bevaried to s 't different conditions.

The web still in opened-up or flat condition then passes about rollersl3 and I4 to bring the flanges of the web into contact withadhesiveapplying discs l5.

These adhesive-applying discs as seen from Fig. 2 are segmental so thatalternate flanges 5 have the adhesive stripes it applied thereto. words,the flanges to one side of one pair of opposed notches 9 will haveadhesive applied thereto, while the adjacent flanges at the other sideof these. notches will be left plain.

The'discs l5 are made adjustable as II to vary the length of theirperiphery. v The web next passes plates l8 which are adapted to turn theflanges 5 which have had adhesive applied thereto inwardly again, sothat these flanges will be pasted'down to the body of the web 2.

To insure that only alternate flanges will be turned inwardly again, Iprovide rocking flngers l9 intermediate the roller I4 and plates i5,these fingers which engage the web along the line of the 55- fold whichprovides the flanges 5 being so timed in elevation of the apparatus ofshown at 5 show the bag in the various In other as which told thisapplication Novemthat the leading end of a pair of pasted flanges willbe directed above the end of the plates ll, 'while the leading end ofthe succeeding pair of flanges will be directed below these plates.

The web next passes between rollers 20, past 5 cutting off mechanism 2|and between rollers 22 and 22.

The cutting of! mechanism comprises a rotary cutter bar 2| driven in thedirection of the arrow on Fig. 1 cooperating with a flxed member 25. 10The function of this cutting of]? mechanism is to sever the main body ofthe web transversely, across opposed notches I! but an appreciabledistance to one side (to the right as viewed in Fig. l) of the center ofthese notches so as to leave a rela- 5 flapv designated 26 in Fig. 1 onthe trailing edge of the cut of! portion and a relatively short flap 21at the leading edgeof the adjacent section of material.

Each length of material, therefore, is approxi- 2o mately double thelength of the finished bag and as shown in Fig. 1 is composed of what Ishall term two panels designated 25 and 29, respectively, the flanges 5of the panel 28 being turned inwardly over upon the body ofthe web 2 towhich 20 they are pasted, whilethe flanges 5 on the panel 30 are in anopened up condition.

The length of material shown at the left in Fig.

1 passes from the rollers 23 to forwarding and creasing rollers 30 andII. The roller 30 is pro- 30 vided with a creaser blade 32 and theroller 2| with a gripper .33. controlled by a cam 2|. The setting andtiming of these two rollers 25 and 2| are such that the creaser blade 32engages the web substantially along the line of Fig. l to 35 force theweb downwardly with respect to the l the gripping flnger 33 may func-Continued rotation of roller and between face of a roller 35 lyingadjacent the two panels lengthwise of the web, over upon each other asillustrated in Fig. 3.

In this condition the inner facesot the flanges 5 of the panel 29 arecontacted with gluing discs 36 which apply adhesive theretoas shown at21 in Fig. 4. 1

The folded material then passes between rollers 32 and finally between apair of superposed belts the flanges 5 of panel 29 over upon the panel25 as shown in Fig. 5 which completes the bag.

While I have illustrated and described one. embodiment of my invention Ido not wish to be limited to the precise structure herein shown and 5creases the notches of described as obviously various modifications andchanges may be made therein without departing from the spirit and scopeof my invention.

This application is a division of my copending application Serial No.688,279 filed September 6, 1933.

What I claim is:

1. A bag making machine comprising in combination web-advancing meansand a pair of rotary notchers at opposite sides of the machine rotatableabout axes parallel to the direction of travel of the web, the notchersof each pair being offset with respect to each other so as to providepairs of notches in the opposed edges of the web, the notches of eachpair being half a bag length apart.

2. A bag making machine comprising in combination web-advancing means,creasing means for providing longitudinal creases adjacent the edges anda pair of rotary notchers at opposite sides of the machine rotatableabout axes parallel to the direction of travel of the web, the notchersof each pair being ofiset with respect to each other so as to providepairs of notches in the opposed edges of the web in line with said eachpair being half a bag length apart.

3. A bag making machine comprising in combination web-advancing means, apair of rotary notchers at opposite sides of the machine rotatable aboutaxes parallel to the direction of travel of the web, the notchers ofeach pair being offset with respect to each other so as to provide pairsof notches in the opposed edges of the web, the notches of each pairbeing half a bag length apart, and cutting off mechanism for severingthe web adjacent alternate pairs of notches into sections substantiallytwice the length of bag lengths.

4. A bag making machine comprising in combination web-advancing means, apair of rotary notchers at opposite sides of the machine driven aboutaxes parallel to the direction of travel of the web, the notchers ofeach pair being offset with respect to each other so as to provide pairsof notches in the opposed edges of the web at substantially a half baglength apart, and means for adjusting the setting of the notchers tovary the distance between notches thereby to accommodate the machine tobags of different lengths.

5. A bag making machine comprising in combination web-advancing means, apair of rotary notchers at opposite sides of the machine driven aboutaxes parallel to the direction of travel of the web, the notchers ofeach pair being offset with respect to each'other so as to provide pairsof notches in the opposed edges of the web at substantially a half baglength apart, means for adjusting the setting of the notchers to varythe distance between notches thereby to accommodate the machine to bagsof different lengths, and cutting off mechanism for severing the webinto sections having opposed notches substantially midway of its ends.

6. A bag making machine comprising in combination web-advancing means,means in the path of the advancing web for turning the edges of the webinwardly to provide side flanges and then to restore the web to flatcondition again, paste applying means for applying spaced stripes ofadhesive to the upper face of said side flanges, pairs of notchers atopposite sides of the machine for notching the edges of the flat web atpredetermined intervals to provide panels in the web the flanges ofalternate panels being pasted,

means following the notchers for refolding the edges of pasted alternateflanges over on the body' length of web substantially twice a bag lengthwith a pair of opposed notches substantially midway of the length.

7. A bag making machine comprising in combination means for applyingpaste at intervals along the opposite edges of a traveling web, notchersfor notching the opposite edges of the web at. each end of the pasteareas, folding mechanism for turning the pasted edges of the webinwardly upon the main portion of the web on further advance of the web,cutting-off mechanism for severing the web transversely at the leadingend of each pasted area, rotaryadvancing or forwarding means foradvancing the severed lengths, and clamping mechanism carried therebyfor gripping a severed length midway of its length so that the severedlength will be deflected out of its previous path of travel and be drawnbetween two rollers to fold the length transversely to bring theportions of the length at each side of the transverse fold intoparallelism.

8. A bag making machine comprising in combination means for applyingpaste at intervals along the opposite edges of a traveling web, notchersfor notching the opposite edges of the web at each end of the pasteareas to provide opposed alternately pasted and unpasted flanges foldingmechanism for turning the pasted flanges inwardly upon the main portionof the web on further advance of the web, cuttingofl' mechanism forsevering the web transversely at the leading end of each pasted area,rotary advancing or forwarding means for advancing the severedlengths,clamping mechanism carried thereby for gripping a severed length midwayof its length so that the severed length will be deflected out of itsprevious path of travel and be drawn between two rollers to fold thelength transversely to form two superimposed panels, paste applyingmeans for applying paste to the unpasted flanges, and means for foldingthe last-mentioned flanges over on the outside of the opposed panel topaste the same thereto.

9. A bag making machine comprising in combination web-advancing means,pairs of notchers mounted on shafts at opposite sides of the machine fornotching the edges of the web at predetermined intervals to provideflanged panels in the web which are to eventually form the walls of thebag, the notchers of each pair being adjustable circumferentially ontheir supporting shaft relatively to each other to vary the spacing ofthe notches in the web, cutting oil. mechanism for severing the webtransversely adjacent alternate pairs of opposed notches.

10. A bag making machine comprising in combination web-advancing means,pairs of notchers mounted on shafts at opposite sides of the machine fornotching the edges of the web at predetermined intervals to provideflanged panels in the web which are to eventually form the walls of thebag. the notchers of each pair being adjustable circumferentially ontheir supporting shaft relatively to each other to vary the spacing ofthe notches in the web, cutting off mechanism for severing the webtransversely adjacent alternate pairs .of opposed notches and rotarymeans adapted to grip the length of web substantially-midway of itslength so that on continued advance of the web length the same will befolded alonga transverse line to bring the two halves into parallelism.

11. A bag making machine comprising in combination web advancing means,pairs of. notchers at opposite sides of the machine for notching theedges of the web at predetermined intervals to provide two adjacentpanels having flanges along their sides, folding means in the path oftravel of the web for folding over the side flanges ,of one panel, meanspreceding said folding means for directing the flanges of one panelthrough said folding means and for directing the flanges of thesucceeding panel outside of said folding means thereby to fold over theflanges of alternate panels.

12. A bag making machine comprising in combination web advancing means,pairs of notchers at opposite sides of the machine for notching theedges of the web at predetermined intervals to provide two adjacentpanels having flanges along their sides, zfolding means in the path oftravel of the web for folding over the side flanges of one panel,rocking fingers preceding said folding means for directing the flangesof one panel through said folding means and for directing the flanges ofthe succeeding panel outside of said folding means thereby to fold overthe flanges of alternate panels.

13. A bag makingmachine comprising in combination web advancing means,pairs of notchers at opposite sides of the machine'for notching theedges of the web at predetermined intervals to provide two adjacentpanels having flanges along their sides, folding means in the path oftravel of the web for folding'over the side flanges of one panel,rocking fingers preceding said folding means for directing the flangesof one panel through said folding means and for directing the flanges ofthe succeeding panel outside of said folding means thereby to fold overthe flanges of alternate panels and rotary means adapted to grip thelength of web substantially midway of its length so that on continuedadvance of the web length the same will be folded along a transverseline to bring the two halves into parallelism.

ADOLPH PO'I'DEVIN.

